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Author Topic: i2c temperaturesensor  (Read 5023 times)
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hi,

i'm searching for a cheap i2c temperaturesensor.
have you got some ideas?

best regards,
stefan
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Personally I had the chance to buy a lot of 1wire sensors cheap, haven't worked with I2C-ones yet.

I don't know what temperatures you'll measure, maybe the LM75 would do the job.

If not, a search on "I2c and temperature" for components in stock gave me this list on Mousers site.
(hopefully there's one on it suiting your needs.)

http://www2.mouser.com/Sensors/Temperature-Sensors/Board-Mount-Temperature-Sensors/_/N-7gz7qZscv7?Keyword=temperature+i2c&FS=True&Ns=Digital%20Output%20-%20Bus%20Interface|0
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You want to use the DS1621.  It costs about the same as a 1-wire temp sensor.
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When asking for a "cheap" solution, it is helpful to define what you consider to be "cheap"...
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http://store.yahoo.com/yhst-27389313707334/i2c12ditese.html 
$15
all set to plug in ...
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STLM75, £1.05 from Farnell UK, but its SMT!
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MCP9800 is less than $1.50US.  SOT23-5 package, surface mount.

Jim

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I am currently using SHT21 sensors for my project

they are however incredibly small so kind of a pain to solder but they give humidity readings and the temperature in Celsius and Fahrenheit.  I think they are about £10 a pop.
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